Let me clarify that sawdust post....
It works when used as the abrasive, when combined with soap it works better. It's less irritating than pumice but does the same function for getting the ground-in crud off your hands. When combined with dish detergent lather, the saw dust does a better job of cleaning off engine/diesel dirt than most of the expensive hand cleaners.
First reply made it sound like that's all I used... nope, there's soap added and I don't strain my dust either, it's a one-time use thing.
"Carry the battle to them. Don't let them bring it to you. Put them on the defensive and don't ever apologize for anything."
Harry S. Truman